University of Costa Rica

About: University of Costa Rica is a education organization based out in San José, Costa Rica. It is known for research contribution in the topics: Population & Venom. The organization has 9817 authors who have published 16781 publications receiving 238208 citations. The organization is also known as: UCR & Universidad de Costa Rica.

Corals and coral reefs of the Pacific of Costa Rica: history, research and status

Abstract: Coral communities, reefs, and isolated coral colonies can be found along the Pacific coast of Costa Rica and offshore islands. In this chapter a brief history of research, and descriptions of the coral communities and reefs of the Pacific coast of Costa Rica are presented. On the north, the reefs are exposed to seasonal upwelling but they are well-developed and the growth rates of several species are higher than in non-upwelling areas. On the south, some reefs have been growing for over 5,000 years, resulting in thick accumulations. There are also reefs at Isla del Coco, 500 km from the coast. Species that are absent or rare in other eastern Pacific sites are found in Costa Rica, e.g. Porites rus and Leptoseris papyracea. The main impact on Pacific reefs has been bleaching and death of corals associated with El Nino warming events. Other reefs exposed to high sediment loads are greatly degraded. Most coral reefs and coral communities of the Pacific coast of Costa Rica are located within protected areas.

Association of interleukin-1B and interleukin-1RN polymorphisms with gastric cancer in a high-risk population of Costa Rica.

Abstract: Articulo cientifico -- Universidad de Costa Rica. Instituto de Investigaciones en Salud, 2005. Este documento es privado debido a limitaciones de derechos de autor.

Supramolecular squares with Rh24+ corners

Abstract: Six molecular squares were obtained by reacting the singly metal–metal-bonded complex [Rh2(cis-DAniF)2(CH3CNeq)4(CH3CNax)2](BF4)2 (DAniF = N,N′-di-p-anisylformamidinate), and (Et4N+)2(Carb2−) where Carb2− represents the dicarboxylate anion bicyclo[1.1.1]pentane-1,3-dicarboxylate, 1; tetrafluoroterephthalate, 2; 1,4-cubanedicarboxylate, 3; terephthalate, 4; fumarate, 5; trans-1,4-cyclohexanedicarboxylate, 6; these squares stack in the crystal forming square channels capable of accommodating solvent molecules and the NMR spectra are consistent with the presence of highly symmetrical structures even in solution.

The Caribbean Low‐Level Jet, the Inter‐Tropical Convergence Zone and Precipitation Patterns in the Intra‐Americas Sea: A Proposed Dynamical Mechanism

Abstract: Data from the Global Precipitation Climatology Project covering Central America, the Caribbean Sea, the eastern tropical Pacific and northern South America are used to compute four indexes that describe characteristics of the Inter-Tropical Convergence Zone: the latitudinal center of mass of precipitation, the longitudinal center of mass of precipitation, the average precipitation in a region bounded by 10° S–25° N and 100° W–55° W, and the spread of the precipitation patterns A very strong correlation is found between summer latitudinal center of mass and a summer index of the Caribbean Low-Level Jet suggesting connections between Pacific and Caribbean climatic processes The sign of the correlation implies that when the jet is stronger (weaker) there is a lower (higher) latitudinal center of mass and at the same time less (more) precipitation in the Pacific slope of Central America The connection between the Caribbean and Pacific climate is not only related to high-level wind convergence, but it is proposed here that local convection and the establishment of a zonal circulation may be playing a role in the process The circulation seems to be consistent during years when latitudinal center of mass is lower than normal, apparently reinforcing the jet, and presents weaker strength during years of high latitudinal center of mass The proposed mechanism is explained in some detail